* [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
@ 2016-08-03 0:33 Dave Chinner
2016-08-03 0:59 ` Dan Williams
` (2 more replies)
0 siblings, 3 replies; 9+ messages in thread
From: Dave Chinner @ 2016-08-03 0:33 UTC (permalink / raw)
To: xfs; +Cc: linux-fsdevel, linux-nvdimm
Hi folks,
Just hit a reproducable hang in generic/361. Essentially this on
a 8GB pmem device:
mkfs.xfs -f /dev/pmem1
mount -o dax /dev/pmem1 /mnt/scratch
xfs_io -f -c "truncate 1g" test.img
losetup -f --show /mnt/scratch/test.img
mkfs.xfs -f /dev/loop0
And the mkfs.xfs command hangs with a discard that never completes:
[ 243.413918] INFO: task mkfs.xfs:5708 blocked for more than 120 seconds.
[ 243.415678] Not tainted 4.7.0-dgc+ #862
[ 243.416772] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 243.418769] mkfs.xfs D ffff880835143c18 13848 5708 5441 0x00000000
[ 243.420620] ffff880835143c18 ffff880835143c20 ffff88083a244780 ffff8808358ba3c0
[ 243.422636] ffff88023aa20000 ffff880835144000 7fffffffffffffff 7fffffffffffffff
[ 243.424586] ffff8808358ba3c0 00000000024000c0 ffff880835143c30 ffffffff81e5e38c
[ 243.426466] Call Trace:
[ 243.427050] [<ffffffff81e5e38c>] schedule+0x3c/0x90
[ 243.428224] [<ffffffff81e62be5>] schedule_timeout+0x265/0x330
[ 243.429563] [<ffffffff8109f125>] ? kvm_clock_read+0x25/0x40
[ 243.430896] [<ffffffff8109f149>] ? kvm_clock_get_cycles+0x9/0x10
[ 243.432360] [<ffffffff81125edc>] ? ktime_get+0x3c/0xb0
[ 243.433556] [<ffffffff81e5db54>] io_schedule_timeout+0xa4/0x110
[ 243.434932] [<ffffffff81e5eed6>] wait_for_completion_io+0xd6/0x110
[ 243.436297] [<ffffffff810decd0>] ? wake_up_q+0x70/0x70
[ 243.437436] [<ffffffff817d6f06>] submit_bio_wait+0x56/0x70
[ 243.438671] [<ffffffff817e851a>] blkdev_issue_discard+0x6a/0xb0
[ 243.439980] [<ffffffff810dab69>] ? __might_sleep+0x49/0x80
[ 243.441182] [<ffffffff817eea87>] blk_ioctl_discard+0x97/0xb0
[ 243.442370] [<ffffffff817ef7bb>] blkdev_ioctl+0x7eb/0x9a0
[ 243.443485] [<ffffffff81236a1d>] block_ioctl+0x3d/0x50
[ 243.444552] [<ffffffff812100df>] do_vfs_ioctl+0x8f/0x670
[ 243.445630] [<ffffffff81002434>] ? exit_to_usermode_loop+0x94/0xb0
[ 243.446902] [<ffffffff81210739>] SyS_ioctl+0x79/0x90
[ 243.447927] [<ffffffff81002bc5>] ? syscall_return_slowpath+0xf5/0x190
[ 243.449236] [<ffffffff81e63d32>] entry_SYSCALL_64_fastpath+0x1a/0xa4
This only reproduces when the underlying filesystem is mounted with
-o dax, so there is a bad interaction with loop devices and DAX
occurring somewhere. generic/361 is a recent test (committed june 14)
so this probably hasn't actually been tested until now.
I haven't got time to look at this right now, hence the report.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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xfs mailing list
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http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-03 0:33 [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems Dave Chinner
@ 2016-08-03 0:59 ` Dan Williams
2016-08-03 17:11 ` Ross Zwisler
2016-08-04 15:48 ` Christoph Hellwig
2 siblings, 0 replies; 9+ messages in thread
From: Dan Williams @ 2016-08-03 0:59 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, linux-nvdimm, XFS Developers
On Tue, Aug 2, 2016 at 5:33 PM, Dave Chinner <david@fromorbit.com> wrote:
> Hi folks,
>
> Just hit a reproducable hang in generic/361. Essentially this on
> a 8GB pmem device:
>
> mkfs.xfs -f /dev/pmem1
> mount -o dax /dev/pmem1 /mnt/scratch
> xfs_io -f -c "truncate 1g" test.img
> losetup -f --show /mnt/scratch/test.img
> mkfs.xfs -f /dev/loop0
>
> And the mkfs.xfs command hangs with a discard that never completes:
>
> [ 243.413918] INFO: task mkfs.xfs:5708 blocked for more than 120 seconds.
> [ 243.415678] Not tainted 4.7.0-dgc+ #862
> [ 243.416772] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 243.418769] mkfs.xfs D ffff880835143c18 13848 5708 5441 0x00000000
> [ 243.420620] ffff880835143c18 ffff880835143c20 ffff88083a244780 ffff8808358ba3c0
> [ 243.422636] ffff88023aa20000 ffff880835144000 7fffffffffffffff 7fffffffffffffff
> [ 243.424586] ffff8808358ba3c0 00000000024000c0 ffff880835143c30 ffffffff81e5e38c
> [ 243.426466] Call Trace:
> [ 243.427050] [<ffffffff81e5e38c>] schedule+0x3c/0x90
> [ 243.428224] [<ffffffff81e62be5>] schedule_timeout+0x265/0x330
> [ 243.429563] [<ffffffff8109f125>] ? kvm_clock_read+0x25/0x40
> [ 243.430896] [<ffffffff8109f149>] ? kvm_clock_get_cycles+0x9/0x10
> [ 243.432360] [<ffffffff81125edc>] ? ktime_get+0x3c/0xb0
> [ 243.433556] [<ffffffff81e5db54>] io_schedule_timeout+0xa4/0x110
> [ 243.434932] [<ffffffff81e5eed6>] wait_for_completion_io+0xd6/0x110
> [ 243.436297] [<ffffffff810decd0>] ? wake_up_q+0x70/0x70
> [ 243.437436] [<ffffffff817d6f06>] submit_bio_wait+0x56/0x70
> [ 243.438671] [<ffffffff817e851a>] blkdev_issue_discard+0x6a/0xb0
> [ 243.439980] [<ffffffff810dab69>] ? __might_sleep+0x49/0x80
> [ 243.441182] [<ffffffff817eea87>] blk_ioctl_discard+0x97/0xb0
> [ 243.442370] [<ffffffff817ef7bb>] blkdev_ioctl+0x7eb/0x9a0
> [ 243.443485] [<ffffffff81236a1d>] block_ioctl+0x3d/0x50
> [ 243.444552] [<ffffffff812100df>] do_vfs_ioctl+0x8f/0x670
> [ 243.445630] [<ffffffff81002434>] ? exit_to_usermode_loop+0x94/0xb0
> [ 243.446902] [<ffffffff81210739>] SyS_ioctl+0x79/0x90
> [ 243.447927] [<ffffffff81002bc5>] ? syscall_return_slowpath+0xf5/0x190
> [ 243.449236] [<ffffffff81e63d32>] entry_SYSCALL_64_fastpath+0x1a/0xa4
>
> This only reproduces when the underlying filesystem is mounted with
> -o dax, so there is a bad interaction with loop devices and DAX
> occurring somewhere. generic/361 is a recent test (committed june 14)
> so this probably hasn't actually been tested until now.
>
> I haven't got time to look at this right now, hence the report.
>
Thanks Dave, we'll take a look.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-03 0:33 [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems Dave Chinner
2016-08-03 0:59 ` Dan Williams
@ 2016-08-03 17:11 ` Ross Zwisler
2016-08-03 22:37 ` Ross Zwisler
2016-08-04 15:48 ` Christoph Hellwig
2 siblings, 1 reply; 9+ messages in thread
From: Ross Zwisler @ 2016-08-03 17:11 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, linux-nvdimm, xfs
On Wed, Aug 03, 2016 at 10:33:54AM +1000, Dave Chinner wrote:
> Hi folks,
>
> Just hit a reproducable hang in generic/361. Essentially this on
> a 8GB pmem device:
>
> mkfs.xfs -f /dev/pmem1
> mount -o dax /dev/pmem1 /mnt/scratch
> xfs_io -f -c "truncate 1g" test.img
> losetup -f --show /mnt/scratch/test.img
> mkfs.xfs -f /dev/loop0
>
> And the mkfs.xfs command hangs with a discard that never completes:
>
> [ 243.413918] INFO: task mkfs.xfs:5708 blocked for more than 120 seconds.
> [ 243.415678] Not tainted 4.7.0-dgc+ #862
> [ 243.416772] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 243.418769] mkfs.xfs D ffff880835143c18 13848 5708 5441 0x00000000
> [ 243.420620] ffff880835143c18 ffff880835143c20 ffff88083a244780 ffff8808358ba3c0
> [ 243.422636] ffff88023aa20000 ffff880835144000 7fffffffffffffff 7fffffffffffffff
> [ 243.424586] ffff8808358ba3c0 00000000024000c0 ffff880835143c30 ffffffff81e5e38c
> [ 243.426466] Call Trace:
> [ 243.427050] [<ffffffff81e5e38c>] schedule+0x3c/0x90
> [ 243.428224] [<ffffffff81e62be5>] schedule_timeout+0x265/0x330
> [ 243.429563] [<ffffffff8109f125>] ? kvm_clock_read+0x25/0x40
> [ 243.430896] [<ffffffff8109f149>] ? kvm_clock_get_cycles+0x9/0x10
> [ 243.432360] [<ffffffff81125edc>] ? ktime_get+0x3c/0xb0
> [ 243.433556] [<ffffffff81e5db54>] io_schedule_timeout+0xa4/0x110
> [ 243.434932] [<ffffffff81e5eed6>] wait_for_completion_io+0xd6/0x110
> [ 243.436297] [<ffffffff810decd0>] ? wake_up_q+0x70/0x70
> [ 243.437436] [<ffffffff817d6f06>] submit_bio_wait+0x56/0x70
> [ 243.438671] [<ffffffff817e851a>] blkdev_issue_discard+0x6a/0xb0
> [ 243.439980] [<ffffffff810dab69>] ? __might_sleep+0x49/0x80
> [ 243.441182] [<ffffffff817eea87>] blk_ioctl_discard+0x97/0xb0
> [ 243.442370] [<ffffffff817ef7bb>] blkdev_ioctl+0x7eb/0x9a0
> [ 243.443485] [<ffffffff81236a1d>] block_ioctl+0x3d/0x50
> [ 243.444552] [<ffffffff812100df>] do_vfs_ioctl+0x8f/0x670
> [ 243.445630] [<ffffffff81002434>] ? exit_to_usermode_loop+0x94/0xb0
> [ 243.446902] [<ffffffff81210739>] SyS_ioctl+0x79/0x90
> [ 243.447927] [<ffffffff81002bc5>] ? syscall_return_slowpath+0xf5/0x190
> [ 243.449236] [<ffffffff81e63d32>] entry_SYSCALL_64_fastpath+0x1a/0xa4
>
> This only reproduces when the underlying filesystem is mounted with
> -o dax, so there is a bad interaction with loop devices and DAX
> occurring somewhere. generic/361 is a recent test (committed june 14)
> so this probably hasn't actually been tested until now.
>
> I haven't got time to look at this right now, hence the report.
Cool, thanks for the report. I've reproduced this with linux/master, and the
test passes with v4.7.
Running a bisect...
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http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-03 17:11 ` Ross Zwisler
@ 2016-08-03 22:37 ` Ross Zwisler
2016-08-03 23:16 ` Dave Chinner
0 siblings, 1 reply; 9+ messages in thread
From: Ross Zwisler @ 2016-08-03 22:37 UTC (permalink / raw)
To: Ross Zwisler, Dave Chinner, xfs, linux-fsdevel, linux-nvdimm
On Wed, Aug 03, 2016 at 11:11:27AM -0600, Ross Zwisler wrote:
> On Wed, Aug 03, 2016 at 10:33:54AM +1000, Dave Chinner wrote:
> > Hi folks,
> >
> > Just hit a reproducable hang in generic/361. Essentially this on
> > a 8GB pmem device:
> >
> > mkfs.xfs -f /dev/pmem1
> > mount -o dax /dev/pmem1 /mnt/scratch
> > xfs_io -f -c "truncate 1g" test.img
> > losetup -f --show /mnt/scratch/test.img
> > mkfs.xfs -f /dev/loop0
> >
> > And the mkfs.xfs command hangs with a discard that never completes:
> >
> > [ 243.413918] INFO: task mkfs.xfs:5708 blocked for more than 120 seconds.
> > [ 243.415678] Not tainted 4.7.0-dgc+ #862
> > [ 243.416772] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > [ 243.418769] mkfs.xfs D ffff880835143c18 13848 5708 5441 0x00000000
> > [ 243.420620] ffff880835143c18 ffff880835143c20 ffff88083a244780 ffff8808358ba3c0
> > [ 243.422636] ffff88023aa20000 ffff880835144000 7fffffffffffffff 7fffffffffffffff
> > [ 243.424586] ffff8808358ba3c0 00000000024000c0 ffff880835143c30 ffffffff81e5e38c
> > [ 243.426466] Call Trace:
> > [ 243.427050] [<ffffffff81e5e38c>] schedule+0x3c/0x90
> > [ 243.428224] [<ffffffff81e62be5>] schedule_timeout+0x265/0x330
> > [ 243.429563] [<ffffffff8109f125>] ? kvm_clock_read+0x25/0x40
> > [ 243.430896] [<ffffffff8109f149>] ? kvm_clock_get_cycles+0x9/0x10
> > [ 243.432360] [<ffffffff81125edc>] ? ktime_get+0x3c/0xb0
> > [ 243.433556] [<ffffffff81e5db54>] io_schedule_timeout+0xa4/0x110
> > [ 243.434932] [<ffffffff81e5eed6>] wait_for_completion_io+0xd6/0x110
> > [ 243.436297] [<ffffffff810decd0>] ? wake_up_q+0x70/0x70
> > [ 243.437436] [<ffffffff817d6f06>] submit_bio_wait+0x56/0x70
> > [ 243.438671] [<ffffffff817e851a>] blkdev_issue_discard+0x6a/0xb0
> > [ 243.439980] [<ffffffff810dab69>] ? __might_sleep+0x49/0x80
> > [ 243.441182] [<ffffffff817eea87>] blk_ioctl_discard+0x97/0xb0
> > [ 243.442370] [<ffffffff817ef7bb>] blkdev_ioctl+0x7eb/0x9a0
> > [ 243.443485] [<ffffffff81236a1d>] block_ioctl+0x3d/0x50
> > [ 243.444552] [<ffffffff812100df>] do_vfs_ioctl+0x8f/0x670
> > [ 243.445630] [<ffffffff81002434>] ? exit_to_usermode_loop+0x94/0xb0
> > [ 243.446902] [<ffffffff81210739>] SyS_ioctl+0x79/0x90
> > [ 243.447927] [<ffffffff81002bc5>] ? syscall_return_slowpath+0xf5/0x190
> > [ 243.449236] [<ffffffff81e63d32>] entry_SYSCALL_64_fastpath+0x1a/0xa4
> >
> > This only reproduces when the underlying filesystem is mounted with
> > -o dax, so there is a bad interaction with loop devices and DAX
> > occurring somewhere. generic/361 is a recent test (committed june 14)
> > so this probably hasn't actually been tested until now.
> >
> > I haven't got time to look at this right now, hence the report.
>
> Cool, thanks for the report. I've reproduced this with linux/master, and the
> test passes with v4.7.
>
> Running a bisect...
This bisected to a commit to the block layer code. I've sent a bug report to
the author of the commit.
- Ross
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-03 22:37 ` Ross Zwisler
@ 2016-08-03 23:16 ` Dave Chinner
2016-08-04 2:52 ` Dan Williams
0 siblings, 1 reply; 9+ messages in thread
From: Dave Chinner @ 2016-08-03 23:16 UTC (permalink / raw)
To: Ross Zwisler, xfs, linux-fsdevel, linux-nvdimm
On Wed, Aug 03, 2016 at 04:37:13PM -0600, Ross Zwisler wrote:
> On Wed, Aug 03, 2016 at 11:11:27AM -0600, Ross Zwisler wrote:
> > On Wed, Aug 03, 2016 at 10:33:54AM +1000, Dave Chinner wrote:
> > > Hi folks,
> > >
> > > Just hit a reproducable hang in generic/361. Essentially this on
> > > a 8GB pmem device:
> > >
> > > mkfs.xfs -f /dev/pmem1
> > > mount -o dax /dev/pmem1 /mnt/scratch
> > > xfs_io -f -c "truncate 1g" test.img
> > > losetup -f --show /mnt/scratch/test.img
> > > mkfs.xfs -f /dev/loop0
> > >
> > > And the mkfs.xfs command hangs with a discard that never completes:
....
> > > This only reproduces when the underlying filesystem is mounted with
> > > -o dax, so there is a bad interaction with loop devices and DAX
> > > occurring somewhere. generic/361 is a recent test (committed june 14)
> > > so this probably hasn't actually been tested until now.
> > >
> > > I haven't got time to look at this right now, hence the report.
> >
> > Cool, thanks for the report. I've reproduced this with linux/master, and the
> > test passes with v4.7.
> >
> > Running a bisect...
>
> This bisected to a commit to the block layer code. I've sent a bug report to
> the author of the commit.
And the commit id is ...?
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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xfs mailing list
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http://oss.sgi.com/mailman/listinfo/xfs
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-03 23:16 ` Dave Chinner
@ 2016-08-04 2:52 ` Dan Williams
0 siblings, 0 replies; 9+ messages in thread
From: Dan Williams @ 2016-08-04 2:52 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, Ross Zwisler, linux-nvdimm, XFS Developers
On Wed, Aug 3, 2016 at 4:16 PM, Dave Chinner <david@fromorbit.com> wrote:
> On Wed, Aug 03, 2016 at 04:37:13PM -0600, Ross Zwisler wrote:
>> On Wed, Aug 03, 2016 at 11:11:27AM -0600, Ross Zwisler wrote:
>> > On Wed, Aug 03, 2016 at 10:33:54AM +1000, Dave Chinner wrote:
>> > > Hi folks,
>> > >
>> > > Just hit a reproducable hang in generic/361. Essentially this on
>> > > a 8GB pmem device:
>> > >
>> > > mkfs.xfs -f /dev/pmem1
>> > > mount -o dax /dev/pmem1 /mnt/scratch
>> > > xfs_io -f -c "truncate 1g" test.img
>> > > losetup -f --show /mnt/scratch/test.img
>> > > mkfs.xfs -f /dev/loop0
>> > >
>> > > And the mkfs.xfs command hangs with a discard that never completes:
> ....
>> > > This only reproduces when the underlying filesystem is mounted with
>> > > -o dax, so there is a bad interaction with loop devices and DAX
>> > > occurring somewhere. generic/361 is a recent test (committed june 14)
>> > > so this probably hasn't actually been tested until now.
>> > >
>> > > I haven't got time to look at this right now, hence the report.
>> >
>> > Cool, thanks for the report. I've reproduced this with linux/master, and the
>> > test passes with v4.7.
>> >
>> > Running a bisect...
>>
>> This bisected to a commit to the block layer code. I've sent a bug report to
>> the author of the commit.
>
> And the commit id is ...?
c2df40dfb8c0 drivers: use req op accessor
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-03 0:33 [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems Dave Chinner
2016-08-03 0:59 ` Dan Williams
2016-08-03 17:11 ` Ross Zwisler
@ 2016-08-04 15:48 ` Christoph Hellwig
2016-08-04 18:46 ` Ross Zwisler
2 siblings, 1 reply; 9+ messages in thread
From: Christoph Hellwig @ 2016-08-04 15:48 UTC (permalink / raw)
To: Dave Chinner; +Cc: linux-fsdevel, linux-nvdimm, xfs
Just send a fix that you're Cc'ed on. But now xfs/049 hangs, although
only on pmem devices, loop on non-pmem seems to be fine. 4.7 was fine
as well.
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-04 15:48 ` Christoph Hellwig
@ 2016-08-04 18:46 ` Ross Zwisler
2016-08-04 18:54 ` Ross Zwisler
0 siblings, 1 reply; 9+ messages in thread
From: Ross Zwisler @ 2016-08-04 18:46 UTC (permalink / raw)
To: Christoph Hellwig; +Cc: linux-fsdevel, linux-nvdimm, xfs
On Thu, Aug 04, 2016 at 08:48:05AM -0700, Christoph Hellwig wrote:
> Just send a fix that you're Cc'ed on. But now xfs/049 hangs, although
> only on pmem devices, loop on non-pmem seems to be fine. 4.7 was fine
> as well.
I don't think Mike's fix solves this issue. I'm still able to reproduce the
hang with linux/master + the patch he sent out.
Did you retest and get a different result?
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems
2016-08-04 18:46 ` Ross Zwisler
@ 2016-08-04 18:54 ` Ross Zwisler
0 siblings, 0 replies; 9+ messages in thread
From: Ross Zwisler @ 2016-08-04 18:54 UTC (permalink / raw)
To: Ross Zwisler, Christoph Hellwig, Dave Chinner, linux-fsdevel,
linux-nvdimm, xfs
On Thu, Aug 04, 2016 at 12:46:58PM -0600, Ross Zwisler wrote:
> On Thu, Aug 04, 2016 at 08:48:05AM -0700, Christoph Hellwig wrote:
> > Just send a fix that you're Cc'ed on. But now xfs/049 hangs, although
> > only on pmem devices, loop on non-pmem seems to be fine. 4.7 was fine
> > as well.
>
> I don't think Mike's fix solves this issue. I'm still able to reproduce the
> hang with linux/master + the patch he sent out.
>
> Did you retest and get a different result?
Never mind, didn't see that you had sent out patches as well.
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^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2016-08-04 18:54 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-08-03 0:33 [4.8 hang] xfstests generic/361 hangs on dax enabled filesystems Dave Chinner
2016-08-03 0:59 ` Dan Williams
2016-08-03 17:11 ` Ross Zwisler
2016-08-03 22:37 ` Ross Zwisler
2016-08-03 23:16 ` Dave Chinner
2016-08-04 2:52 ` Dan Williams
2016-08-04 15:48 ` Christoph Hellwig
2016-08-04 18:46 ` Ross Zwisler
2016-08-04 18:54 ` Ross Zwisler
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